Double-seaming machine.



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Patented Mar. 26, |90I.A

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Patented Mar. 26, |901.l

' F. DAVIS.

DDUBLE SEAMING MA CM|NE.

(Application mqd Apr. '12, who.)

4 Sheets-Shin#A 3.

. Patented Mar. 26, I90I. W. F.- DAVIS.

DOUBLE SEAMING MACHINE'.

(Appucman med Apr. 12, 1900;.

4 sheets-sheet 4 (No Model.)

A'rnNT Fringe.

WARREN FrDAVIS, OF SAN FRIANCISCO, CALIFORNIA, ASSIGNOR, BY DIRECT AND MESNE ASSIGNMENTS, TO THE PACIFIC SHEET METAL WORKS, OF

SAME PLACE.

DOUBLE-SEAMING MACHINE.

SPECIFICATION forming part of Letters Patent No. 670,632, dated March 26, 1901,

Application filed April 12, 1900. kSerial No. 12,604. (No model.)

To @ZZ whom t may concern: 4

Be it known that I, WARREN F. DAvIs, a citizen of the United States, residing at San Francisco, in the county of San Francisco and State of California, have invented certain new and useful Improvements in Double-Seaming Machines, of which the following is a speci fication.

My invention relates to machinery for securing heads to sheet-metal can-bodies by double-seaming-that is, by placing the flange of the head over the free edge of the body and then turning the two thicknesses of metal together outwardly and downwardly and then compressing them inwardly.

The object of my invention is to providea machine which will do this Work rapidly and perfectly and Without preliminary langing of the can-bodies.

My invention comprises improvements in the way of holding and rotating the can and head, improvements in the construction of the double-seaming mechanism, in the automatic release of the headed cans, in the automatic stoppage of the seaming mechanism after a can has been headed, and in many features of construction whichA I do not attempt to set forth here, but which are fully hereinafter described and are shown in the accompanying drawings, in connection with which this description should be read.

In the drawings, Figure 1 is a front elevation. Fig. 2 is a horizontal section on line ocx of Fig. 5. Fig. 3 is an enlarged front elevation, partly insection, of the devices shown in Fig. 2. Fig. 4 is a detail section of the members of the friction-clutch Which controls the revolution of the seaming-rollers. Fig. 5 is a side elevation of the machine. Fig. 6 is a detail elevation, partly'in section, of the yielding can-support. Fig. 7 is .a ,plan view of said support. Fig. 8 is a detail elevation of the upper end of the slotted casing or sleeve which surrounds said support. Fig. 9 is a side elevation of the machine from the direction opposite to Fig. 5. Fig. 10 is a detail view of the cam-disk which controls the disengagement of the friction-clutch and its connections. Fig.`ll is a section of the same.

Fig. 12 is a side elevation of the cam-disk which controls the vertical movement of the can-support. the same. Fig. 14 is an enlarged elevation of the rotating head which carries the seam-- ing-rollers. Fig. 15 is a plan of the same. Fig. 16 is an elevation of the bracket which carries the slidable rollers which cooperate with the rollers carried by the head shown in Fig. 14. Figs. 17 to 22, inclusive, show successive positions of the can body and head during the operation of double seaming and the respective rollers which perform these successive operations. Fig. 23 shows a modiication in the shape o f the finishing-roller shown in Fig. 22. Fig. 24 is a cross-section through the hollow main standard near its base, showing the counterweight for the cansupport.

The entire mechanism is carried by a vertical standard A, which is hollow and has at its upper end bearings for a driving-shaft A', carrying a driving-pulley K.

B is a bracket in a vertical slot a5 on the main standard and held by a counterbalance W, suspended by a chain d within the main standard. This bracket when properly adjusted for any size of cans is secured in the slot by the bolt a6. Thisbracket has a bearing o.' for` the spindle a, of the disk B', which is the can-body support. The spindle a is seated by a ball-and-socket connection on a block a2, Fig. 6, which has a guide-pin a3 Working in slots in the casing a4. A coil pressurespring b is held in the casing beneath block d2, the pressure beingl regulated by the follower b'Y and screw b2. This construction 'pref vents the can body and head from being unduly squeezed between the said support and the head-clamp C. When the can, with its head loosely in place, is set upon the support Fig. 13 is a side elevation of B', thelatter is raised until the body and head are held between such support and the clamp or disk C. A foot-treadle D is adjustably connected by a rod D to a crank D2, secured to a rock-shaft D3. This shaft has a forked arm D5, pivoted to the casing a4. Depression of the treadle lifts the said casing, spindle ct, and can-support bodily and vertically, the spindle sliding in its bearings d' and the spring-seat relieving any undue pres- Sllle.

The clamp C, which coperates With the IOO support B' to hold the can and its loosely placed head until the heading operation is completed, is carried by a vertical spindle C', journaled in the top of standard A, and is constantly revolved by the main shaft th rough ruiter-gears g g'. When the can-support is lifted so as to clamp the can, the latter and its support derive a rotary motion from the disk C in a horizontal plane. The head is secured and double-seamed with the edge of the body by a series of progressive operations taking place during a number of revolutions of the can-body and produced by the successive actions of a series of rollers 1, 2, 3, et, 5, and 6, mounted in a revolving carrying-head E, and two other rollers 7 and 8, mounted to slide upon a bracket E'. The carrying-head E is upon a spindle e, Figs. 1 and 5, and is driven by the skew-gears F and F', the gear F being on the spindle and the gear F' being carried by a horizontal shaft f, which has another worm-gear G, Fig. 9. The upright spindle e is journaled in arms Of the bracket E', and the bracket itself has a slide L, by which it is adjusted in the guide L' of' the main frame by means of the screw L2, working in the nut L3, Fig. 1G. This is for the purpose of adjusting the head and rollers to cans of different diameters. The main vertical spindle C has a worm G', which at proper times transmits motion to worm-gear G, shaft f, spindle e, and the carlyinghead. The worm G' is, however, not fixed upon the spindle C', but is formed with a loose clutch-sleeve H, Fig. 3, upon said spindle, whose operation will be presently explained.

Upon the outer end of the horizontal shaft fis mounted the skew-gear l, which drives a cross-shaft f' through a skew-gear I2 upon the end of said shaft f'. Upon this shaft are mounted cam-disks J and J', Fig. 9 and details on same sheet. A hand -lever K' is forked to inclose by fitting a groove in the 0perating member H' of the clutch, of which the sleeve H forms a part. (See Figs. 2 and 3.) The part H' is a sleeve loose on the shaft and having a lower beveled edge 7L. The third member of the clutch is a disk H2, keyed to the shaft C' and which fits loosely within the flange of the sleeve H. The disk H2 is cut away to form elastic tongues 7L', having inclined ends h2. Pivoted upon the disk H2 are two curved levers h3, having adjustable headed bolts h4 at one end and projecting studs h5 at the other. These studs when the clutch is in operation bear in opposite directions upon the beveled ends of the tongues h. When the lever K' is operated to lower the loose sleeve H', the beveled edge of the latter strikes the two bolt-heads h4, and so causes the stu ds h5 to force the spring-tongues against the surrounding ange of the member H, giving motion to the worm G'.V This worm drives the gear G on the shaft f, which operates the carrying-head E, as before explained. Thus the main spindle is constantly rotating, as well as the can and head, when in position;

but the seaming-rollers do not come into operation until the lever K' throws the clutch into engagement with the main spindle. At this time the can, with it-s loose head, has been clamped in such position that the seaming-rollers, before referred to, act upon it successively, while both the can and th e rollercarrying head -are being revolved, the ratio of revolution being such that the can and head rotate a number of times to one rotation of the roller-carrying head. The seamingrollers are journaled loosely in the head and operate by friction-alcontact and pressure upon the can-head. To make the successive operations intelligible, I refer to Fig. llt and the other figures on the same sheet of the drawings. It will be noticed in the first place, however, that the can-body is a plain cylinder and has had no edge flange formed upon it before being assembled with the head for double-seeming. On the contrary, this machine acts on plain can-bodies and flanged can-heads, the latter being stinken or paneled deeply enough to allow sufficient material to form the double seam between body and head. The first step, Fig. 17, is the squeezing of the can-head Bange against the can -body by means of the flat-faced roller l. As the can rotates many times faster than the roller-carrying head, the parts have been fully brought to the shape shown in Fig. 17 before the second roller 2, Fig. 18, is brought into operation. rThis roller 2 has a narrow flat face, which continues to hold t'ne can and head up against the disk C; but it also has a curvi linear periphery forming a resistance to the compression exerted by the upper adjustable roller-7. Thelatterhasabevelededge, which turns the double flange out at an angle, while the curved face of roller 2 causes the edge of the head-flange to bend downward, all as shown in Fig. 18. At the next step, Fig. 19, the roller 3 comes into operation and performs two functions. It has an upper flat-bottomed ledge 13, which continues to hold the double flange down, and now against asharply-beveled lower surface 23, the latter closing the turned-over and projecting edge of the head flange against the other two thicknesses. At the next step, Fig. 20, the inclined roller ft from above coperates with the lower slidablc roller 8 to continue the operation of' turning over the double fiange which has been formed, but is not fully pressed in against the canbody. In Fig. 21 the roller 5 continues this operation just before the roller 8 loses contact, as shown, while in Fig. 22 the last roller 6 of the series finishes the compression and leaves the can double-scanned. The double seam produced by this finishing-roller has a rounded or beaded effect, caused by the shape of the roller. If, therefore, a flattened seam is desired, the roller 16, Fig. 23, should be substituted for the roller 6.

The rollers 7 and 8, the effect of whose operations has been described, but not their construction, are mounted so as to have a IOO sliding motion toward or from the point of operation. They are journaled in arms e e2 of bracket E and upon slide-blocks c3 e4, each of which carries a roller e5 e6. These rollers last named engage with the cam-grooves e7 es in the carrying-head, Fig. 14, which are so arranged that the rollers 7 and 8 come into operation from above and below at the proper v times, as before described, and in the manner shown in Figs. 18, 20, and 21. While the clamping of the can and its hea and the engagement of the friction`clutch are performed by the operator, the first by means of the foot-treadle D and the latter by the lever K', the release of the can and the disengagement of the clutch are done automatically after the seaining-rollers have completed their work. These results are produced by the cam-disks J' and Jon the shaft f operating through connections shown in Fig. 9 and in details on same sheet. The disk J bears normally upona roller j, carried by the slotted end ot' a rod jz, suspended from the shaft, the latter passing through the slot. This rod is pressed by a springj3 at its lower end in the base of the standard, Fig. 1; ,but the spring is normally overcome by the action of disk` J upon the rollerj. rlhe rod is connected by an arm ,7'4 to the rock-shaft D3 and so to the can-support. A deep recess y" is formed in the edge of the cam-disk,

Qand the shaft f' is timed and the disk J is positioned so that at the end of a revolution of the roller-carrier or head the recess permits the pressure-spring to force rod jz upwardly, and so lower the can-support with the headed and double-seamed can away from contact with the clamp above. While this is taking place, the cam-disk J is also in operation. This disk has a raised rim provided with an interior projectionm and an exterior projection m. The projection m bears at the proper time upon a roller m2 on the slotted and spring-pressed rod q. A pivoted lever q' is connectedv to rod q and to the hand-lever K', Fig. 9. The depression of rod q raises lever K and the member H of the friction-clutch, thereby releasing the latter. At the same time the projection m', through lever n and link n, Figs. 2 and 10, clamps a brake upon the part H of the clutch and stops the motion and that of the driving-worm G', carried by it. lThe brake comprises two springarxns M M, secured to the main frame, Fig. 2, and having curved extremities adapted to bear upon the clutch-disk H. The link n is connected to a lever n2, whi'ch bears upon a projection n3 upon one of the brake-arms.V

f rollers stops immediately, and the can, with its head double-seamed and complete, can be removed from the support.

In operating this machine it is not the intention that the operator, by means ofv the foot-treadle D, shall do more than raise the can-support, so that the can-head makes a contact with the upper clamp. The actual pressure is derived from the cainfdisk J. At, the beginning of the operation the rollerj is in the recessj. As soon, however, as the operator depresses the lever K the gearing starts into operation, the roller leaves the recess, and the disk J forces the rod y'2downf ward and holds it there until the complete revolution of said cam-disk brings the recess around again. can-support maintains the pressure against the upper clamp. 'lheoperator may immediately remove his foot from the treadle after depressing the clutch-leve r.

I do not limit myself to exact details of construction shown in the drawings and herein described, as I desire to avail myself of such modifications and equivalents as fall properly within the spirit of my invention.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In an automatic double-seaming machine for operating upon tlangeless can-bodies and their heads, a rotary clamp adapted to receive and rotate a can-body and its head, a rotary c'arrier having a series of seaming-rollers, gearing for driving the rotary clamp, gearing for driving the rotary carrier, and means for engaging and for disengaging said gearings.

2. In an automatic double-seaming machine for operating upon tlangeless can-bodiesjand their heads, arotary clamp adapted to receive and rotate a can-body and its head, a rotary carrier having a series of seaming-rollers, gearing for driving the rotary clamp, gearing for driving the rotary carrier, a hand-lever for causing the engagement of said gearings, and automatic means for causing their disengagement.

3. In a' double-searning machine, a rotary clamp for holding a can body and head, in combination with a rotary carrier-head, a series of seaming-rollers carried by said head,

and independentlymounted sliding rollers, said revolving rollers adapted to act successively upon the said body and head, and said sliding rollers being adapted to also act upon said body and head.

4.. In a double-seaming machine, a rotary clamp for a can body and head, gearing for rotating the same at relatively high speed, a carrier having a series of seaming-rollers, and gearing for rotating said carrier at relatively low speed. l

5. In a double-seaming machine, a vertically-movable can-support, a rotary chuck or clamp coperating therewith to hold and rotate the cans and heads, a rotary carrier havingseaming-rollers, a clutch on the spindle of said chuck, gearing for driving said carrier deriving motion from said clutch, and means also operated by said clutch when in engage- The connection of rodj`2 tothe ICO IZO

ment, for automatically disengaging said clutch and for releasing the can from the Clamp.

6. In a double-seaining machine, a oonstantly-rotating clamp or chuck, a eluteh on its spindle having a gear, a rotary carrier having seaining-rollers, gearing between said elntolrgear and said carrier for driving the latter, a lever for throwing said clutch into engagement with the chuck-spindle, and a eain operating at the same relative speed as the said carrier, and having Connections operated at each revolution for reversing said lever.

7. In a donble-seaming machine, a seaming implement comprising a rotary carrier, a series of rollers jonrnaled in the periphery of said Carrier, and in substantially the saine horizontal plane, upper and lower sliding rollers and cam-grooves in the carrier for moving said upper and lower rollers toward and from the point of double-seanling, whereby they are caused to coperate with said rollers in the carrier.

8. In a donble-seaming machine, a eonstantly-rotating clamp, a clutch on its spindle having a gear, a rotary carrier having seaming-rollers, gearing between said clutchgear and said carrier for driving the lat-ter, a lever for throwing said clutch into engagement with the clamp-spindle, a rotary cam having Connections operated at each of its revolutions for reversing said lever, a brake for stopping the clutch as soon as disengaged, and Connections between the said earn and said brake.

In testimony whereof I have aflixed my signature, in presence of two witnesses, this 5th day of April, 1900.

WARREN F. DAVIS.

Witnesses:

L. W. SEELY, F. M. BURT. 

